This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI80X375S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI80 Standard Air Cylinder SI80X375S
The AirTAC SI80 Standard Air Cylinder SI80X375S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 375mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI80X375S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke375 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI80X375S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI80 Standard Air Cylinder SI80X375S
The AirTAC SI80X375S is a discontinued double-acting ISO 15552 profile cylinder featuring an extruded aluminum barrel and a built-in piston magnet for CS1-B/DS1-B switches. Delivering 2513 N of push force at 0.5 MPa, it operates at 30-800 mm/s with a G3/8 port and M20x1.5 rod thread. The direct replacement is the SAI80X375S, which shares the exact same ISO 15552 mounting interface, bore, stroke, and accessories.
The SAI upgrade introduces an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The SAI family also adds SAIL, SAIF, and BSAI lock variants the SI lacked. Rod material options include carbon steel, SUS420J2, or SUS304.
Airtac SI80 Standard Air Cylinder SI80X375S Technical Specifications
| Model | Airtac SI80 Standard Air Cylinder SI80X375S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI80X375S |
| Bore size | Ø80 mm |
| Stroke | 375 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI80X375S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The SAI80X375S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI80 Standard Air Cylinder SI80X375S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×375 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI80 Standard Air Cylinder SI80X375S Is Used
Pallet Diversion
Pushes heavy pallets sideways off a main conveyor line using the 2513 N push force at 0.5 MPa, with the 375 mm stroke clearing the belt path completely.
Vertical Lift Gate
Actuates a 128 kg mezzanine safety gate, matching the computed vertical lift capacity while relying on external guides to support the long 375 mm extension.
Press Ejection
Ejects formed metal parts from a hydraulic press, utilizing the adjustable 36 mm air cushions to decelerate the rod smoothly at stroke end.
Replacing the Airtac SI80 Standard Air Cylinder SI80X375S with the SAI80X375S
To replace the SI80X375S, order the SAI80X375S and confirm the ISO 15552 mounting interface, 80 mm bore, 375 mm stroke, G3/8 port, and your specific mounting accessory (LB, FA, TC, etc.). The -S suffix ensures the piston magnet is included for legacy CS1-B/DS1-B sensors, though the SAI replacement uses current AirTAC switches. When sizing, note the 4523 N push force at 0.9 MPa; if you need less force, step down to a 63 mm bore, or step up to 100 mm for 3927 N at 0.5 MPa. Because this is a 375 mm stroke, use an external guide to prevent rod bending and side-load damage. A plain cylinder does not hold load on air loss—the cushion only decelerates—so use an external rod lock or pilot check valve, or specify the SAIL/BSAI lock variant for secure holding.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI80X375S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI80 Standard Air Cylinder SI80X375S FAQ
Yes, the SI80X375S is discontinued. The direct replacement is the SAI80X375S. It is dimensionally interchangeable per ISO 15552, matching the 80 mm bore, 375 mm stroke, 2513 N force, G3/8 port, and mounting interface.
The G3/8 port bore delivers a push of 2513 N and pull of 2268 N at 0.5 MPa. At 0.7 MPa the push is 3518 N, and at 0.9 MPa it is 4523 N. The theoretical maximum force is 513 kgf at 1.0 MPa.
Related AirTAC SAI Cylinders
Request a Quote for the SAI80X375S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI80X375S replacement — usually within 7-8 hours.